Although it is the responsibility of the motorist to check before opening their door, riding too close to parked cars (in the door zone) is still a common mistake bicyclists make that can lead to serious injury. For more information on this type of bicycle facility, visit the Sharrows FAQ.
triangle. n. 1. (Mathematics) geometry a three-sided polygon that can be classified by angle, as in an acute triangle, or by side, as in an equilateral triangle. Sum of interior angles: 180Â°; area: base Ã height. 2. any object shaped like a triangle. 3. any situation involving three parties or points of view. See also eternal triangle. 4. (Instruments) music a percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick.
Triangle Classification. The basic elements of any triangle are its sides and angles. Triangles are classified depending on relative sizes of their elements. A triangle is scalene if all of its three sides are different (in which case, the three angles are also different). If two of its sides are equal, a triangle is called isosceles. A triangle with all three equal sides is called equilateral. S.